<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <div v-bind:id="a" v-bind:a="b">aaa</div>
    <hr>
    <label for="img1">佳丽1</label>
    <input type="radio" v-model="imgUrl" value="http://img.jj20.com/up/allimg/1114/010621114212/210106114212-1-lp.jpg" id="img1">
    <label for="img2">佳丽2</label>
    <input type="radio" v-model="imgUrl" value="http://img.jj20.com/up/allimg/1114/122620120K7/201226120K7-1-lp.jpg" id="img2">
    <hr>
    <!-- <img v-bind:src="imgUrl" alt=""> -->
    <img :src="imgUrl" alt="">
  </div>
  <script src="./vue.js"></script>
  <script>
    const vm = new Vue({
      el: '#app',
      data: {
        a: 'box',
        b: 'aaaaaaa',
        imgUrl: 'http://img.jj20.com/up/allimg/1114/010621114212/210106114212-1-lp.jpg'
      }
    })
  </script>
</body>
</html>